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@cedricboudinet @stephane
cedricboudinet authored and stephane committed Jul 16, 2024
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Expand Up @@ -19,6 +19,8 @@ message, the header or CRC of the selected backend, so `raw_req` must start and
contain at least a slave/unit identifier and a function code. This function can
be used to send request not handled by the library.
The tid paramter enables one to specify a transaction identifier.
The public header of libmodbus provides a list of supported Modbus functions
codes, prefixed by `MODBUS_FC_` (eg. `MODBUS_FC_READ_HOLDING_REGISTERS`), to help
build of raw requests.
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